Unit 4: Energy
Text Resources
Learning Targets:
Outline:
Alternative assignments:
ChemQuest - Thermodynamics
ChemQuest - Hess' Law
Homework
Vocabulary:
Alternate Powerpoint:
Chapter 13: section_1, section_2, section_3, section_4
Chapter 17: section_1, section_2, section_3, section_4
Key Objectives: Unit 6
Chemistry - Wilbraham et al (Pearson 2012)
Chapters:
17
Good Problems to Master:
17: 42,45,46,49,50,52,55,59,61,62,63,65,66,69,71,73,78,79,82,83,84
Text Resources
- Chapter 9 in OpenStax Chemistry Atoms First text chapter 9
Learning Targets:
- Be able to describe the Kinetic Molecular Theory
- Be able to explain the Maxwell Boltzman distribution
- Be able to provide molecular descriptions of solids, liquids, gases and vapor pressure
- Be able to use specific heat to determine energy changes due to temperature changes
- Be able to use enthalpy to describe energy changes of reactions
- Be able to distinguish between thermal energy and energy of interactions
- Be able to use enthalpy to describe phase changes
- Be able to calculate energy with multiple phases
- Be able to interpret phase change diagrams
- Be able to use Hess’ law to find enthalpy of a reaction
- Be able to use standard enthalpy of formation to find enthalpy of a reaction
- Be able to use bond energy to find enthalpy of a reaction
Outline:
- Intro Slides here
- Reaction Puzzle 1: Dye diffusion in hot vs cold water
- Simulation - explore learning - here
- Group learning: Calorimetry here
- Lab: Cooling Curve of Water vs Ethanol
- Return to slides - heat description and energy calcs (see intro slides)
- Energy calcs1: Specific Heat SkillsPractice - Specific Heat
- Homework problem set A - sections 1-3 w/answer (here)
- Lecture 2: Specific Heat (slides)
- Lab practical: Predict temperature gain of cold water when combined with hot metal (Lab or simulation)
- Reaction Puzzle: Explain freezing of water (Demo or Lab)
- Energy calcs2: Energy and Changes in matter
- Video: evaporative cooling here
- Reaction Puzzle 3: Endothermic and exothermic rxns (Lab)
- Representing energy in reactions (follow on from lab - slides)
- Phase diagrams: - Phase Diagrams
- Endothermic vs Exothermic - Endo-Exo thermic worksheet
- Calorimetry (Lab) Fake data for lab
- Lecture 3: Energy in stoichiometry
- Practice energy calcs: stoichiometry here and here
- Introduction to Hess' Law - Slides
- Lecture 4: Hess' Law - Practice here
- Group Learning: Bond Energy here and practice here
- Simulation - energy and Hess (here)
- Skills Test: calorimetry, energy of phase changes, energy in stoichiometry, Hess' Law, Bond energy
- Review problems here
- Infographic Student Investigation and Presentation (explanation here)
- Confirmation experiment: Swamp cooler (here, slides) or Experimental confirmation of Hess' law (Lab)
- Practice Phase diagrams (here) and energy of phase changes (here)
Alternative assignments:
ChemQuest - Thermodynamics
ChemQuest - Hess' Law
Homework
- Part 1 here
- Part 2 here
Vocabulary:
- Kinetic energy
- Kinetic molecular theory
- Vaporization
- Evaporation
- Vapor pressure
- Boiling point
- Melting point
- Freezing point
- Sublimation
- Phase diagram
- Triple point
- Thermochemistry
- Chemical potential energy
- Heat
- System / surroundings
- Law of conservation of energy
- Endothermic
- Exothermic
- Heat capacity
- Specific heat
- Calorimetry
- Enthalpy
- Thermochemical equation
- Heat of reaction
- Heat of combustion
- Molar heat of fusion
- Molar heat of solidification (fusion)
- Molar heat of vaporization
- Molar heat of condensation
- Molar heat of solution
- Hess’ law
- Standard enthalpy of formation
Alternate Powerpoint:
Chapter 13: section_1, section_2, section_3, section_4
Chapter 17: section_1, section_2, section_3, section_4
Key Objectives: Unit 6
Chemistry - Wilbraham et al (Pearson 2012)
Chapters:
17
Good Problems to Master:
17: 42,45,46,49,50,52,55,59,61,62,63,65,66,69,71,73,78,79,82,83,84